290 LECTURES TO SCIENCE TEACHERS. 



in determining the so-called British Association Unit of 

 Resistance. Here is the coil with which the resistance of 

 the revolving apparatus was compared periodically during 

 the course of the experiments ; and here are multiples of 

 the standard so established, by ten, one hundred, and a 

 thousand. 



END OF VOL. i. 



LONDON: R. CLAY, SONS, AND TAYLOR. 



